一个凯撒密码的源程序，实现文件的加密和解密过程，适用于学生参考。-A Caesar cipher source code to achieve the file encryption and decryption process is suitable for students.

基于VC++制作的一元多次方程的解。对于学习C、C++语言的初学者和数学基础的同学。这是一个很简单的事例让大家学习简单的算法-Based on VC++ produced multiple equation solution. For learning C, C++ languages ​ ​ the beginners and mathematics students. This is a very simple example of learning simple alg